I am trying to setup a USB dongle on my device by following the post here. I wasn't successful in setting it up and while tracing my steps discovered that
echo "1c9e:9ba1" > /sys/bus/usb-serial/drivers/generic/new_id
was resulting in an error. I ran this statement from the terminal and got the following response
bash: echo: write error: Invalid argument
according to the post here it means that the device doesn't implement a WRITE method.
Wondering if there is a way to get the echo command to work so that I can get my USB modem working.